kernel_montecarlo.h File Reference

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Functions
CCL_NAMESPACE_BEGIN __device void	to_unit_disk (float *x, float *y)
__device void	make_orthonormals_tangent (const float3 N, const float3 T, float3 *a, float3 *b)
__device_inline void	sample_cos_hemisphere (const float3 N, float randu, float randv, float3 *omega_in, float *pdf)
__device_inline void	sample_uniform_hemisphere (const float3 N, float randu, float randv, float3 *omega_in, float *pdf)
__device float3	sample_uniform_sphere (float u1, float u2)
__device float	power_heuristic (float a, float b)
__device float2	concentric_sample_disk (float u1, float u2)
__device float2	regular_polygon_sample (float corners, float rotation, float u, float v)
__device float2	direction_to_spherical (float3 dir)
__device float3	spherical_to_direction (float theta, float phi)

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Function Documentation

__device float2 concentric_sample_disk	(	float	u1,
		float	u2
	)

Definition at line 121 of file kernel_montecarlo.h.

References cosf, M_PI_4_F, make_float2(), and sinf.

Referenced by camera_sample_aperture().

__device float2 direction_to_spherical

(

float3

dir

)

Definition at line 190 of file kernel_montecarlo.h.

References acosf, atan2f, make_float2(), float3::x, float3::y, and float3::z.

Referenced by sky_radiance().

__device void make_orthonormals_tangent	(	const float3	N,
		const float3	T,
		float3 *	a,
		float3 *	b
	)

Definition at line 70 of file kernel_montecarlo.h.

References cross().

Referenced by bsdf_ward_eval_reflect(), and bsdf_ward_sample().

__device float power_heuristic	(	float	a,
		float	b
	)

Definition at line 116 of file kernel_montecarlo.h.

Referenced by direct_emission(), and indirect_emission().

__device float2 regular_polygon_sample	(	float	corners,
		float	rotation,
		float	u,
		float	v
	)

Definition at line 164 of file kernel_montecarlo.h.

References angle(), cosf, floorf, M_PI_F, make_float2(), p, sinf, sqrtf, float2::x, and float2::y.

Referenced by camera_sample_aperture().

__device_inline void sample_cos_hemisphere	(	const float3	N,
		float	randu,
		float	randv,
		float3 *	omega_in,
		float *	pdf
	)

Definition at line 76 of file kernel_montecarlo.h.

References B, M_1_PI_F, make_orthonormals(), max, N, sqrtf, T, and to_unit_disk().

Referenced by bsdf_diffuse_sample(), bsdf_translucent_sample(), bsdf_westin_sheen_sample(), WestinSheenClosure::sample(), TranslucentClosure::sample(), and DiffuseClosure::sample().

__device_inline void sample_uniform_hemisphere	(	const float3	N,
		float	randu,
		float	randv,
		float3 *	omega_in,
		float *	pdf
	)

Definition at line 89 of file kernel_montecarlo.h.

References B, cosf, M_1_PI_F, M_PI_F, make_orthonormals(), max, N, sinf, sqrtf, and T.

Referenced by bsdf_ashikhmin_velvet_sample(), bsdf_oren_nayar_sample(), AshikhminVelvetClosure::sample(), and OrenNayarClosure::sample().

__device float3 sample_uniform_sphere	(	float	u1,
		float	u2
	)

Definition at line 105 of file kernel_montecarlo.h.

References cosf, fmaxf, M_PI_F, make_float3(), sinf, and sqrtf.

__device float3 spherical_to_direction	(	float	theta,
		float	phi
	)

Definition at line 198 of file kernel_montecarlo.h.

References cosf, make_float3(), and sinf.

CCL_NAMESPACE_BEGIN __device void to_unit_disk	(	float *	x,
		float *	y
	)

Given values x and y on [0,1], convert them in place to values on [-1,1] uniformly distributed over a unit sphere. This code is derived from Peter Shirley, "Realistic Ray Tracing", p. 103.

Definition at line 41 of file kernel_montecarlo.h.

References cosf, M_PI_4_F, and sinf.

Referenced by disk_light_sample(), and sample_cos_hemisphere().